<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		
		<button type="button" onclick="asd()">跳转到c</button>
		<button type="button" onclick="aa1()">后退</button>
		<button type="button" onclick="aa2()">前进</button><br>
		<button type="button" onclick="ad1()">刷新</button>
		
	</body>
	<script type="text/javascript">
		function asd(){
			location.href='c.html'
		}
		function aa1(){
			history.go(-1)
		}
		function aa2(){
			history.go(1)
		}
		
		function ad1(){
			location.reload();
		}
	</script>
</html>
